Cooling water flows through the 25.4-mm-diameter
Chapter , Problem 8.49(choose chapter or problem)
Cooling water flows through the 25.4-mm-diameter thin-walled tubes of a steam condenser at 1 m/s, and a surface temperature of 350 K is maintained by the condensing steam. The water inlet temperature is 290 K, and the tubes are 5 m long. (a) What is the water outlet temperature? Evaluate water properties at an assumed average mean temperature, . (b) Was the assumed value for reasonable? If not, repeat the calculation using properties evaluated at a more appropriate temperature. (c) A range of tube lengths from 4 to 7 m is available to the engineer designing this condenser. Generate a plot to show what coolant mean velocities are possible if the water outlet temperature is to remain at the value found for part (b). All other conditions remain the same
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